Machine for making paper bags.



F. HEPP.

MACHINE FOR MAKING PAPER BAGS.

APPLICATION FILED 33.17, 1909.

8 SHEETSSHEET 1.

I'l /777586158 IIVVE/VTOI? 6.6? wmzi Patented Aug. 12, 1913.

F. HEPP.

MACHINE I'OR MAKING PAPER BAGS. APPLICATION FILED 513.17, 1909.

1,070,341 Patented Aug. 12, 1913.

8 SHEETS-SHEET 2.

P. HEPP.

MACHINE FOR MAKING PAPER BAGS.

APPLICATION FILED IBB.17,1909.

8 SHEETSSHEET 3,

| 1 i s I r H F. HEPP.

MACHINE FOR MAKING PAPER BAGS.

APPLICATION FILED PEB.17, 1909.

1,070,341, Patented Aug. 12,1913.

8 SHEETSSHEET 4.

MQM

P. HEBP. MACHINE FOR MAKING PAPER BAGS.

APPLICATION FILED PEB.'17, 1909. 1,070,341 Patented Aug. 12, 1913.

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MIA-070k "VI/V5886) F. HEPP. MACHINE FOR MAKING PAPER BAGS.

APPLICATION FILED FEB. 17, 1969.

Patented Aug. 12, 1913.

8 SHEETSSHEET 6.

P. HEPP.

MACHINE FOR MAKING PAPER BAGS.

. APPLICATION FILED PEB.1'I, 1909. 1 O70 341 Patented Aug. 12, 1913.

8 SHEETSSHEET 7.

WIT/75665 5 34-5134,

' P. HEPP. MACHINE FOR MAKING PAPER BAGS.

APPLICATION FILED FEB.17, 1909. I I

' Patented Aug. 12, 1913.

8 SHEETS-SHEET 8.

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MACHINE FOR MAKING PAPER BAGS.

Specification of Letters Patent.

Application filed February 17, 1909. Serial No. 478,510.

To all whom it may concern movement. at an angle depending on the formof the bag, in order to be conveyed to 'thcapparatus for closing theirlaps.

The advantage of this arrangement is that, while the laps are beingfolded and stuck, the blanks are being moved continuously, in their ownplane, While the apparatus serv ing to close the laps can be arrangedsuitably distributed behind each other and stationaryin regard to theblanks. By this means the blanks, which mostly consist of very thinpaper are not acted on over a larger area or distance simultaneously andas a consequence creases are avoided. Further, the time lost andadditional work entailed, when the blanks periodically stop, in order tobe acted upon by moving apparatus, as in existing machines are saved. Byusing this improved machine theproduction of the bags can be carriedout, not only by taking the blanks separately from a heap, but also bycutting said blanks from a stri of paper continuously fed to themachine, which strip in the case of rectangular bags is divided intoseparate blanks by a longitudinal middle cut, by which the bottom lapsare simultaneously formed and these blanks can be led off, at an angle,in opposite directions, to the apparatus for closing the laps, so that adouble pro-- duction is obtained.

In the accompanying drawing a machine for making rectangular paper bagsis shown by way of example.

Figure -1 shows a longitudinal section of the middle part of themachine,'Fig. 2, a transverse section of the entire machine, Fig.

. 3, a diagrammatic plan, Fig. 4, a plan of the middle of one side partof the machine, Fig. 5, a section of the current distributer, Fig. 6', alongitudinal part section of another construction of the machine, andFig. 7 a plan of the second construction partly in section, while Figs.8-19v representdetails, and Fig. 20, a section on the line ab in Fig. 4.

The paper strip passes from the roll P over the guide roll 1 and table Tand is taken up by the endless belts B, B which are driven by the rolls4, 5 from the shaft \V (Fig. 4). By said endless belts the strip ismoved overthe table T -and between the cutting rolls 8, 9, then over thetable T to the endless belts D, D Between the belts B, B (Fig. 4) orbehind the cutting rolls 8, 9 the longitudinal cutting device 14 isprovided, which consists of segmental or diagonal knife blades 15, 16,adapted to operate in connection with the circular blades 18 and roll 17on the shaft 11 (F igs. 1 and 19). The side blades 15 of the cutter-"14, whose dimensions are chosen according to the size of the paper bagto be made, project beyond the circumference of the middle portion andhave intersect-ions so that the paper strip is not entirely divided bythe cut.

From the paper strip provided with the PatentedAug'.12,1913.

longitudinal and prismatically interrupted cut, which is interrupted bythe spaces in the knife blades 15 (Fig. 13), a double blank f, f is cutofi by the rotary cutters 8 and 9, (Fig. 10) driven from the shaft W,which, during each rotation, out said paper strip twice transversely ata distance apart equal to the gumming lap a, a (Fig. 13). The cuttingrolls, which are connected with each other by the spur-wheels 20 aredriven by a bevel-wheel 19 (Fig. 4), which is exchangeable according tothe size of the paper bag to be made. ()n the circumference of thecutting rolls 8, 9 are provided flat toothed knife blades 21, 22, (Fig.4), which are not in a continuous line across the circumference, but onesomewhat behind the other. The cutting edges of these blades projectbeyond the circumference of the top roll, while they are at the samelevel with the circumference of the bottom roll, so that there is nospace between the circumference of the roll and the top of the table T(Fig. 10). Endless belts D, D, which are driven at a higher speed thanthe paper strip, are carried at one end by the rolls 24, 25, and are indriving connection with each other'by means of the spur-wheels 23, whileat their other ends they are carried by the rolls 28, 29, j ourna'led inthe levers 27 which are kept apart by the springs 26 (Figs. 1 and 4). Assoon as the 22 engage with each other the projections 30 at the sides ofthe rolls 8, 9 strike against the free ends of the levers 27, and,consequently, the belts D, D carried by the rolls 28, 29, are broughtcloser together, so that they catch the separated blanks f, f and conveythe same, owing to their different speeds, at suitable intervals to thefolding device F. Over the folding plate F (Figs. 11 and 12) belts 33are provided, which are carried by the driven roll 24 and by the roll 32journaled in the lever 31. 'Said belts 33 glide over the surface of thetable F and convey the blanks f, f to the stop 35, against which theirfront edges are pressed.

In order to prevent the blank being caught by the slot 36 in the plateF, when passingthereover, a slide acted on by springs 37 is provided,which on the blade S descending is pressed aside. On both ends of thefolding blade S there are ribs 38, 39. As soon as the double blank 1, fhas been pressed by the belts 33 against the stop 35, the folding plateS, which is acted on by the springs 40, is moved by an electromagnet(Figs. 4 and 5), and its lower rounded edge arrives at the level of theslot in the folding plate F. When the blade S descends the ribs 38,whose ends are beveled ofi", come into engagement with slides 43,connected by pins 42 with a common slide 41, which slide is moved so asto open the slot 36 (Fig. 11). At the same time the ends of thebell-crank levers 31 provided with rolls 44 are pressed aside by theribs 39, so that the roll 32 is raised and the belts 33 are moved awayfrom the surface of the folding plate and the double blank P, f caughtby the folding blade S is released. Between the belts 33 there are rods46 secured to arail 45 arranged across the folding plate (Figs. 11

and 12), in order to prevent the blank being bent by the blade S fromcoming into en: gagement with the continuously moving belts 33 thenraised above said rods 46.

Underneath the folding plate F is provided a shaft 49, which isconnected with the shaft W by bevel-wheels 47 and is driven by thepulley 48. On said shaft 49 is fastened the drum 52, by which the belts50 and 51 are operated. (Fig. 1.) Whereas the belts 50 and 51 which passaround the roll 55 journaled in the levers 54 and the roll 53respectively are driven direct by the drum 52, the belts 59, which alsopass around similar rolls 56, carried by the levers 54, and around rolls57 and 58 are moved by friction against the belts 50, 51. The doubleblank f, f on the middle or folding line of which the folding rail Sdescends is pushed in doubled form through the slot 36 into engagementwith the belts 50 and 59 (Fig. 11), by which it is sharply folded andthen delivered to the turning plate 60. Over said plate are provided theguide belts 64, which Loreen operate in connection with the stop 61(Figs. 6 and 7) and pass around the driving roll 53 and the rolls 62,63, and over the surface of the plate 60. In thisconstruction shown inFigs. 2, 6 and 7 are provided on both sides of the double blank f, F,whose folding edge presses against the stop 61, the belts 65, 66, whichrotate in-opposite directions and are situated at the same level as thesurface of the turning plates (Fig, 2). Over the rolls 67, 80, by whichthe belts 65, 66 are carried, are situated the separating or tearingrolls 71, 72, which are connected together by the frame 69 (Figs. 2 and6) and supported by the springs 70. These rolls 71 and 72 are loweredsimultaneously by an electromagnet. As soon as the folded double blank ff passing over the turning plate 60, arrives at the stop 61 (Fig. 6),the tearing rolls 71, 72 are pressed against the belts 65, 66 or thelike, which pass around the rolls 67 80, the double blank being thusseparated along the middle cut, whereupon the separate blanks f comeinto engagement with the belts 73, 74 which operate in connection withthe folding belts 66, 65 and are carried by the rolls 77, 78 and 82, 83(Figs. 2, 6 and 7).

Fig. 3 shows diagrammatically the further manipulation of the blanks fThe separate blanks f, f transported away in opposite directions on eachside of the turning plate 60 are moved further in such a manner, thatthe side laps a, a come into position for the application of the gum,which is effected by a rotating disk nozzle 75 (Fig. 8), to which thegum or the like is fed. Said disk operates in connection with a grooveddisk 76 in such a manner that the surface of the lap a, a directedtoward the nozzle 75 can come into contact with the circumference ofsaid disk nozzle. Whereas the laps a of the blanks f passing toward theleft (Fig. 3) are bent upward, the laps a of the blanks f passing towardthe right, are bent downward, gum being applied to the correspondinginner side in each case. In the first case the folding belt 65, carriedby the lower rolls 67, 68, is broader than the upper belt 74 (Figs.v 2,3, 6 and 7) carried bythe rolls 77, 78, while in the second case (on theright side) the broader folding belt 73, carried by the rolls 82, 93, isover the narrower belt 66, carried by the rolls 80, 81. Above or belowthat part of the folding belts 65, 73 not in contact with the respectivebelts 74, 66 a longitudinal blade 84 is so provided that its narrow endslightly and resiliently touch the belts 65, 73 (Figs. 14-18, 3 and 7 Atthe side of each of the belts 65, 73 there is provided a rail 85, whoseinner surface is longitudinally twisted through 180. Said rail begins atthe same level with the operative surface of the folding belt, while itsother end is twisted over to touch said surface. The front end of therail 85 is preferably jointed to a fixed bolt 86 (Fig. 14), while theopposite end, which'is twisted over the surface of the belt, is pressedby a spring 87,

or the like, on said belt.

The separate blanks f f whose laps a, a project over the edges of thefolding belts 65, 73, are pressed by the belts 74, 66 against thefolding belts 65, 73 and are advanced under or over the surface of thefixed blades 84. The inner surface of the laps, to which the gum isapplied by any suitable gumming device such as the disk shown in Figs. 8and 9, glide over the inner surface of the longitudinally twisted rails85 and are accordingly folded around the longitudinal edge of the blades84. The folded laps (1, a are pressed by the inner smooth surface of therail 85 against the body portion of the blanks over or under the blades84, being thus sharply folded and attached. The blanks f f after theirlongitudinal edge has been closed, are transported over the plates tothe turning plates 88, provided on each side of the machine, and areadvanced to the stops 89 by the belts 92, carried by the rolls 90 anddriven from the rolls 78, 83 by means of the belt 91. Said stops89retain the blanks in position, whereupon the latter are moved away at anangle corresponding to the form of the paper bag by means of the rolls100 ,(Figs. 2 and 7). The rolls 100 are adapted to be movedelectromagnetically and operate in connection with the folding belt 97or transport belts 98, carried by the rolls 93, 94 and 95, 96respectively. The blanks f, f are then brought between the folding belts97, 105 and transport belts 98, 106, carried by the bottom rolls 93, 94(95, 96) and the top rolls 101, 102 and 103, 104 respectively, whereuponthe laps b, 72 provided for closing the bottom of the bags are gummedand attached in exactly the same way described above in connection withthe side laps. The finished bags are then delivered out of the machineby the rolls 94, 102 and 96, 104, driven by the belts 107 from the shaftW. In order to obtain a good attachment of the laps elastic sleeves 108are arranged at the ends of the rolls 78, 81 and 96, 102 carrying thenarrower belts, which sleeves firmly press the laps a, a and b, b on thebody of the blanks, in this way obtaining a good attachment.

In a second construction of the turning devices shown in Figs. 1, 4 and20 are provided over the turning plates 60 in a frame 119, or the like,belts 114 carried by the rolls 112, 113, rotating in oppositedirections. These belts are adjusted vertically against the tension ofthe spring by an electromagnet or eccentric from the shaft 6. The belts114 are preferably moved by the belts 115, carried by the rolls 77, 78or 82, 83,

tate on the shaft 124.

and by the rolls 112 or 113, in which case the belts 73 and 74 can bedivided (Fig. 4). Underneath the plate 60 are disposed the resiliently journaled tearing rolls 116, which correspond with the rolls 112, 113,carrying the belts 114 and projecting beyond the surface of the plates,which rolls 116 operate with the oppositely moved tearing belts 114, insuch a manner, that the double blanks passing over the plate 60 towardthe stop 61 are seized, divided and led off.

Fig. 20 shows a section on the line (ll-b of Fig. 4. Over the turningplate 88 pairs of rolls 118 are situated, which are acted on by thesprings 99, are vertically guided and adapted to be operated byelectromagnets through the agency of a lever 117. These rolls arejournaled in the frame 119. Over the rolls 118 are moved the belts 120,

which are each kept in motion by one of the belts 115, carried by therolls 101, 102, 103,-;

104 and the rolls 118. In order to preventthe separate blanks fromgetting into a crooked position, when turning the corner, a verticallyreciprocated rail 121 is provided in each case, which passes through thecorresponding plates 88 and is fastened to the frame 119. The sidesurfaces of the rail 121 projecting over the plate 88 or itslongitudinal edges serve as a guide for the blanks.

Fig. 8 shows one of the gumming devices arranged above or below theblank according as the top or bottom surface of the lap has to begummed. Said device consists of a shaft 124 having a central channel 122and radial channels 123, on which shaftthere is secured a disk 125adjacent to whoseinner edge there is a second disk 127 adapted to ro-This disk 127 is pressed against 125 by a spring 129 adjustable by meansof the ring 128. The gum or the like is fed to the shaft 124 through apipe 130, which projects into the end of said shaft 124, being providedwith a semi-spherical end for the purpose. The gum enters under pressureand passes into the inclosed space formed by the disks 125, 127, fromwhich it arrives in a groove 131 between the two disks. In order toprevent the gum or the like from being thrown off a porous ring 132(Fig- 9) fills out the groove 131, which ring absorbs the gum andapplies the same uniformly to the laps passed thereover. The

' wiper 133 is designed to wipe oif the gum,

which might collect on the circumference of the disk in the firstconstruction. The grooved disk 7 6 arranged over or below the disks 125,127 and driven from the shaft 124 by means of spur-wheels covers thecircumference of the disks 125, 127 so that a lap passing between thesetwo disks will be' ben't down against theguinming surface. Wherecuttingdevice with l niform speed, the speed as the paper strip is fed to thetransverse v I of rotation of the circular knives can be regulated byexchangeable spur-wheels 19 in such a manner that during each rotationand between the cutting periods a width of paper "corresponding to thesize of the paper bag .ments, but these movements can also be ob tainedby suitable eccentrics or the like.

Electric current supplied by the cable 70 is conveyed by the brushes 136to the insu-- lated contact ring 137 on the shaft 6 and passes throughthe rail 7, which connects the distributing disks 138 (Figs. 5, 4),insulated on the shaft 6 and through the contact pins 140, elasticallyarranged on the disks 138 (Fig. 5), which pins are preferably made ofcarbon and bear against the inside surface of the rings 139, to theserings 139, which are adapted to be adjusted by means of the worms 141and are each adapted to rotate in an insulatin disk 142. The rings 139are connected with the respective electro-magnets 134, 135 in series bya cable It. The current passes from the electro-magnets through aregulating resistance, not shown in the drawing, to the return cable.the inside surface of the rings 139 there is a non-conducting layer 143,by which the electric current is interrupted in each revolution of theshaft 6. During this interruption, which takes place in connection witheach ring 139 the blade S and rolls 71, 72 and 100, or 112, 113 and 118,which were pressed down when the current was flowing, are raised bysprings 40, and 99 into their top position, which operation is repeatedfor each blank.

lVhat I claim and desire to secure by Letters Patent of the UnitedStates is 1. In a machine for, making paper bags from a pa er strip, thecombination with the paper f eding, double blank cutting and foldingdevices, of a device to separate the parts of said double blank,comprising in combination, two transporting mechanisms arrangedtransversely to, and in the same horizontal plane with, the line of feedof said double blanks and moving in opposite directions, and means tofeed said double blanks simultaneously between both said transportingmeans, substantially as and for the purpose set forth.

2. In a machine for making paper bags from a paper strip, thecombination with the paper feeding, double blank cutting and foldingdevices, of a device to separate the parts of said double blanks,comprising in oreen combination, two endless belts arranged transverselyto the line of feed of said doubleblanks, rolls to carry and drive saidbelts in opposite directions, and means to press said double blankssimultaneously on both of said belts, substantially as and for thepurpose set fort-h.

3. In a machine for making paper bags from a paper strip, thecombination with the paper feeding, double blank cutting and parts ofsaid double blanks, comprising in combination, two endless beltsarranged J75 folding devices, of a device to separate the an obliquejoining cut inthe middle, a device for transversely'cutting the blank ina staggered line with an oblique joining cut in the middle, and a devicefor folding the' longitudinally and transversely cut blank.

across the middle oblique longitudinal joining cut, substantially as andfor the purpose set forth.

5. In a machine for making paper bags from a paper strip, thecombination with the paper feeding and double blank cutting de vices, ofa device to fold the double blanks, comprising in combination, a foldingplate having a tightly closing slot, means to convey the double blanksto the middle of said folding plate, means to open the slot in saidfolding plate, a folding blade adapted to be moved into said slot whenbeing opened, and a pair of endless belts arranged immcdiatelylunderneath said folding plate, substantially as and forthe purpose setforth.

6. In a machine for making paper bags from paper blanks, the combinationwith the device to turn around the edges of the! blanks, of a device toapply an adhesive, comprising in combination, two disks arrangedparallel to each other, a shaft carrying said disks and having alongitudinal channel, a spring to press said disks to gether, a porousring arranged between said disks at the outer circumference, and meansto guide the blanks over the porous ring, substantially as and for thepurpose set forth.

7. In a machine for making paper bags from paper blanks, the combinationwith the device to turn around the edges of the blanks, of a device toapply an adhesive, comprising in combination, two disks arrangedparallel to each other, a shaft carrying said disks and having alongitudinal channel, a spring to press said disks together, a porousring arranged between said disks at the outer circumference, means toguide the blanks over the porous ring, and means to remove and take upthe superfluous adhesive on the porous ring, substantially as and forthe purpose set forth.

- 8. A machine for making paper bags from two paper blanks, comprisingin combination, two pairs of endless belts adapted to convey the paperblanks in opposite directions, two pairs of endless belts disposed at anangle to said first air, two stops to limit the movement of said paperblanks by said point to which the paper blanks are brought 20 by saidfirst pairs of endless belts, and

-means to cause said rolls to approach and recede from each other,substantially as and for the purpose set forth.

In testimony whereof I have signed my 25 name to this specification inthe presence of two subscribing witnesses.

FRIEDRICH HEPP.

Witnesses WOLDEMAR HAUPT, HENRY HASPER.

